Advance and retard fuel-oil pump



w. 1. wooncocK.

ADVANCE AND RETARD FUEL OIL PUMP.

APPLICATION FILED NOV-25, 1919.

1,375,746. Patented Apr- 26, 1921.

[IVVENTOR WILLARD JAY WOODCOCK, 0F BROOKLYN, NEW Y0.

V v ADVANCE AND BETARD FUEL-01L PUMP.

Specification of Letters Patent.

Patented Apr, 26, 1921.,

Application filed November 25, 191.9. Serial No. 340,661.

To all whom it may concern:

Be it known that I, WILLARD JAY Wool)- COCK, citizen of the United States, and resident of Brooklyn, New York, in the county of Kings and State of New York, have invented certain new and useful Improvements in Advance and Retard Fuel-Oil Pumps, of which the following is a specification. 7

My invention relates to an advance and retard fuel oil pump for internal combustion engines.

The usual method of attaching a fuel oil pump to an internal combustion engine is in a fixed and pre-determined position in relation to the crank of the engine; therefore the fuel injection cannot be altered and the engine many times starts in the wrong direction. It is also a well known fact that fuel oils of different densities require a differently timed injection to obtain the best results. v

The object of my invention is to advance or retard the fuel oil pump as may be desired, and thereby obtain the best possibleresults.

This feature of, my invention can be accomplished by constructing the pump in a closed case attached to a trunnion which can swing in a stationary frame to which the suction and discharge connections are at tached and the necessary connections continuing to the pump through holes drilled longitudinally through the said trunnion, the device forming an oil tight structure. The

pump can be advanced or retarded to any degree in relation to the crank of the: en-

The method of obtaining this result is illustrated in the accompanying drawing.

Figure 1 shows a sectional elevation.

Fig. 2 shows a sectional end view and the adjustable relation of the pump to the crank of the engine.

Reference being made to Fig. 1, the numeral 1 represents an inclosed case containing the fuel oil pump-plunger 2.; the barrel 3 of the pump is a part of the case casting, as is also the trunnion f, which is mounted in the stationary frame 5 in a manner so that the case containing the fuel pump can swing in either direction. I

The stationary frame 5 is arranged to receive the connection 6 from the source of fuel supply to the suction ports 7 in the pump plunger 2, by means of the hole 8 drilled longitudinally in the trunnion 1. The perforated gland 9 is to facilitate-packing the oints, and thereby reducing the otherwise length of the device.

The discharge from the pump in a likewlse manner passes through the hole 10 .to the pipe connection 11 to the cylinder of the engine, which is not shown, in theusual manner.

The glands 12, 13, 14 and 15 make the en tire structure oil tight, 16 representing the bonnet of the case, which is removed to assemble the rotating shaft 17 to which is attached the cam 18, which actuates the pump plunger 2. V

The stroke of the pump is varied from Zero to full stroke by the control lever 19, which operates the cam 20 by means of lhe spindle 21 and which limits the travel of the plunger 2 by means of contact with the enlarged section 22, which is an integral part of the plunger.

The rotating cam 18 performs the discharge stroke, and the spring 23 the return or suction stroke, which is limited by the cam 20 from zero to full stroke.

The control lever 24.- is attached to the case 1 and engages with the stationary frame 5 in such a manner that it remains as placed, and the pump stroke control lever 19 is arrangedfin a similar manner with the case bonnet '16.

Referring to Fig. 2, in which like numerals refer to like parts, it is quite evident that when the crank 25 is on the top center and the pump plunger 2 is. at the finish of its discharge stroke that injection has taken place, and consequently the mixture of oil.

and air has fired at this point. Now, if the casecontaining the fuel pump is advanced or retarded any number of degrees, the point of injection and consequent firing takes place at a like position of the crank 25, which is the object of this invention.

The construction may be for single or multiple cylinder engines and may vary in detail or application.

Having thus described my invention, what I claim as new is:

1. In an internal combustion engine, a fuel pump consisting of a cylinder, a plunger in said cylinder, means to actuate said plunger, and a support for said cylinder adapted to move about said actuating means.

2. In an internal combustion engine, a fuel pump consisting of a cylinder, a plunger in said cylinder, means to actuate said plunger, a supporting member for said cylinder arranged to move about said actuating means, a stationary member supporting said movable member, pipe connections to said pump, and means to regulate the amount of fuel discharge from said pump.

3. In an internal combustion engine, a fuel pump consisting of a cylinder, a plun- 10 ger in said cylinder, means to actuate said plunger, and a support for said cylinder adapted to move about said actuating means,

and concentric with said actuating means.

Signed at Brooklyn, New York, in the county of Kings and State of New York 15 this 17th day of November, A. D. 1919. WILLARD JAY ,WOODCOCK. Witnesses:

AUsUsTA A. lVooDcooK, MARY E; DUNCAN. 

